I'm preparing a review of early air rifle telescope sights and as can be imagined BSA feature quite prominently. I have examples of all 1960s BSA 'scopes other than the Mk III, which was a British made externally adjustable sight (not to be confused with the 1970s Japanese made Mk 3 4x15).

Does anyone have an example of such a sight for sale. I'd prefer a boxed one but would consider unboxed as well.

Kind regards,

John